To begin with, In a pressure cooker add all the ingredients for the dal and pressure cook it on a moderate flame for 6 whistles or 15 minutes.
In a kadhai add oil and cumin seeds, once they splutter add the mashed ginger, garlic, curry leaves and onion.
Saute on a moderate flame for 30 seconds on a moderate flame or until fragrant.
Add the powdered spices and saute for 30 more seconds.
Add the moringa leaves and saute for 10 seconds or until they start to wilt.
Strain the moong dal water into the kadhai, add salt and cook for another 5 minutes or until lightly thickened.
Strain the soup and mash the cooked veggies.
Add back half the mashed veggies, add pepper powder and mix. Serve hot.